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Merge branch 'fscache-fixes' into for-next

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This commit is contained in:
Al Viro
2015-06-23 18:01:30 -04:00
parent a6de82cab1 4a47132ff4
commit 8ea3a7c0df
11 changed files with 397 additions and 203 deletions
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33
fs/cachefiles/namei.c
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@@ -97,7 +97,8 @@ static noinline void cachefiles_printk_object(struct cachefiles_object *object,
* call vfs_unlink(), vfs_rmdir() or vfs_rename()
*/
static void cachefiles_mark_object_buried(struct cachefiles_cache *cache,
struct dentry *dentry)
struct dentry *dentry,
enum fscache_why_object_killed why)
{
struct cachefiles_object *object;
struct rb_node *p;
@@ -132,8 +133,9 @@ found_dentry:
pr_err("\n");
pr_err("Error: Can't preemptively bury live object\n");
cachefiles_printk_object(object, NULL);
} else if (test_and_set_bit(CACHEFILES_OBJECT_BURIED, &object->flags)) {
pr_err("Error: Object already preemptively buried\n");
} else {
if (why != FSCACHE_OBJECT_IS_STALE)
fscache_object_mark_killed(&object->fscache, why);
}
write_unlock(&cache->active_lock);
@@ -265,7 +267,8 @@ requeue:
static int cachefiles_bury_object(struct cachefiles_cache *cache,
struct dentry *dir,
struct dentry *rep,
bool preemptive)
bool preemptive,
enum fscache_why_object_killed why)
{
struct dentry *grave, *trap;
struct path path, path_to_graveyard;
@@ -289,7 +292,7 @@ static int cachefiles_bury_object(struct cachefiles_cache *cache,
ret = vfs_unlink(d_inode(dir), rep, NULL);
if (preemptive)
cachefiles_mark_object_buried(cache, rep);
cachefiles_mark_object_buried(cache, rep, why);
}
mutex_unlock(&d_inode(dir)->i_mutex);
@@ -394,7 +397,7 @@ try_again:
"Rename failed with error %d", ret);
if (preemptive)
cachefiles_mark_object_buried(cache, rep);
cachefiles_mark_object_buried(cache, rep, why);
}
unlock_rename(cache->graveyard, dir);
@@ -422,7 +425,7 @@ int cachefiles_delete_object(struct cachefiles_cache *cache,
mutex_lock_nested(&d_inode(dir)->i_mutex, I_MUTEX_PARENT);
if (test_bit(CACHEFILES_OBJECT_BURIED, &object->flags)) {
if (test_bit(FSCACHE_OBJECT_KILLED_BY_CACHE, &object->fscache.flags)) {
/* object allocation for the same key preemptively deleted this
* object's file so that it could create its own file */
_debug("object preemptively buried");
@@ -433,7 +436,8 @@ int cachefiles_delete_object(struct cachefiles_cache *cache,
* may have been renamed */
if (dir == object->dentry->d_parent) {
ret = cachefiles_bury_object(cache, dir,
object->dentry, false);
object->dentry, false,
FSCACHE_OBJECT_WAS_RETIRED);
} else {
/* it got moved, presumably by cachefilesd culling it,
* so it's no longer in the key path and we can ignore
@@ -522,7 +526,7 @@ lookup_again:
if (d_is_negative(next)) {
ret = cachefiles_has_space(cache, 1, 0);
if (ret < 0)
goto create_error;
goto no_space_error;
path.dentry = dir;
ret = security_path_mkdir(&path, next, 0);
@@ -551,7 +555,7 @@ lookup_again:
if (d_is_negative(next)) {
ret = cachefiles_has_space(cache, 1, 0);
if (ret < 0)
goto create_error;
goto no_space_error;
path.dentry = dir;
ret = security_path_mknod(&path, next, S_IFREG, 0);
@@ -602,7 +606,8 @@ lookup_again:
* mutex) */
object->dentry = NULL;
ret = cachefiles_bury_object(cache, dir, next, true);
ret = cachefiles_bury_object(cache, dir, next, true,
FSCACHE_OBJECT_IS_STALE);
dput(next);
next = NULL;
@@ -610,6 +615,7 @@ lookup_again:
goto delete_error;
_debug("redo lookup");
fscache_object_retrying_stale(&object->fscache);
goto lookup_again;
}
}
@@ -662,6 +668,8 @@ lookup_again:
_leave(" = 0 [%lu]", d_backing_inode(object->dentry)->i_ino);
return 0;
no_space_error:
fscache_object_mark_killed(&object->fscache, FSCACHE_OBJECT_NO_SPACE);
create_error:
_debug("create error %d", ret);
if (ret == -EIO)
@@ -927,7 +935,8 @@ int cachefiles_cull(struct cachefiles_cache *cache, struct dentry *dir,
/* actually remove the victim (drops the dir mutex) */
_debug("bury");
ret = cachefiles_bury_object(cache, dir, victim, false);
ret = cachefiles_bury_object(cache, dir, victim, false,
FSCACHE_OBJECT_WAS_CULLED);
if (ret < 0)
goto error;